WorksheetsFirst Law of Thermodynamics
Total questions: 15
Worksheet time: 15mins
A process during which the temperature of a sample of gas doesn't change is called an (a) process
Consider the pV diagram shown. Consider the magnitude of work done on the gas during each process AB, BC, CD and DA. Reorder the magnitude of work done from least to greatest.
A to B
B to C
C to D
D to A
The pV diagram shows an ideal gas undergoing a cyclic process - A to C to D to B to A. What is the correct magnitude and sign of the work done on the gas during the section B to A?
600 J
400 J
- 600 J
- 400 J
40J of work is done by a gas when the system has an increase in internal energy of 125J. What energy is needed to do so?
205J
Can't accomplish
1200 J of heat are added to a sample of gas while 400 J of work is done by the gas. What is the change in internal energy of the gas?
-1600 J
-800 J
What does the "U" stand for the formula ΔU = Q − W ?
Temperature
What is the name of the process in which pressure remains constant.
isochoric process
For an isothermal process, which of the following statements is correct?
Work and heat balance each other, so that there is no change in internal energy.
Work, heat, and internal energy all undergo changes.
No work is done; internal energy change is due to heat.
No energy is transferred as heat; internal energy change is due to work.
No work is done on or by the system
Isothermal
Adiabatic
Isovolumetric
Isolated System
Internal energy is used exclusively for work.
Isovolumetric
Adiabatic
Isothermal
Isolated System
Heat transferred is completely used for work.
Isothermal
Isovolumetric
Adiabatic
Isolated system
Symbol that indicates that energy is released.
U
Q
-Q
W
During a thermodynamic process, 200 kJ of heat is added to a system, and the system performs 120 kJ of work. What is the change in internal energy of the system?
80 kJ
320 kJ
-80 kJ
200 kJ
